function controleer(formulier)
{
   var melding = "";
   if(formulier.Reactie.value == "")
   {
       document.getElementById("Reactie").className = 'veldFout';
       document.getElementById("Reactie").focus();
       melding = "geef melding";
   }
   else
   {
       document.getElementById("Reactie").className = 'veld';
   }

   if(formulier.Naam.value == "")
   {
       document.getElementById("Naam").className = 'veldFout';
       if(melding == "") document.getElementById("Naam").focus();
       melding = "geef melding";
   }
   else
   {
       document.getElementById("Naam").className = 'veld';
   }

   if(formulier.Email.value == "")
   {
       document.getElementById("Email").className = 'veldFout';
       if(melding == "") document.getElementById("Email").focus();
       melding = "geef melding";
   }
   else
   {
       if (formulier.Email.value.search(/^[^@]+@[^@]+.[a-z]{2,}$/i) == -1) 		
       {
           document.getElementById("Email").className = 'veldFout';
	   if(melding == "") document.getElementById("Email").focus();
           melding = "geef melding";
       }
       else
       {
           document.getElementById("Email").className = 'veld';
       }
   }

   if (melding !== "")
   {
       document.getElementById("Melding").style.display = 'block';
       return (false);
   }
}
function textCounter(field, maxlimit)
{
   if (field.value.length > maxlimit)
   {
       field.value = field.value.substring(0, maxlimit);
   }
}
function geefWeer(id)
{
	document.getElementById(id+'_extra').style.display = "block";	
}